Rocky Beach, California - Justus Jonas (Julius Weckauf) is the "head" of the famous detective trio The Three ???, which is completed by Peter Shaw (Nevio Wendt) and Bob Andrews (Levi Brandl). What the three boys have in common is their passion for mysteries and inexplicable secrets. During the summer holidays, the three friends travel to Romania for an internship on the film set of "Dracula Rises". As soon as they arrive in Transylvania, mysterious events begin to occur in the old castle that serves as the original setting for the film.